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Establishment and drawing method of high compression reflowable file

A high-compression, file-based technology, applied in computer parts, character and pattern recognition, special data processing applications, etc., can solve problems such as no solutions are given, and achieve the effect of improving compression efficiency

Inactive Publication Date: 2017-01-11
龚如宾
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Problems solved by technology

Since the layout document does not contain digital book layout logical structure information and geometric layout information, it cannot be read on a mobile terminal in a screen-adaptive manner
How to effectively use the information of color layer images, background layer images and binary text graphics layer images to generate geometric layout information and logical layout information of layout documents, so as to realize screen adaptive display of layout documents, in Document 2, Document 3 and Document No relevant solutions are given in 4

Method used

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  • Establishment and drawing method of high compression reflowable file
  • Establishment and drawing method of high compression reflowable file
  • Establishment and drawing method of high compression reflowable file

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Embodiment Construction

[0058] The invention provides a method for establishing and drawing a highly compressed reflowable file based on an image format format file. This method first performs page geometric layout analysis on image format layout files; using the results of geometric layout analysis, the geometric regions are classified into foreground regions suitable for compression using PNG, TIFF G4 and other discrete tone compression algorithms and suitable for JPEG or JPEG2000 according to compression characteristics. The background area type compressed by other continuous tone compression algorithms; and the foreground area type is used to generate the color layer image, the binary text graphic layer image; the binary text graphic layer image and the original page image data are used to generate a smooth background layer image to facilitate Use layered compression technology to compress image format layout files. The layout document structure description information generation module uses the r...

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Abstract

The invention relates to a method for establishing and drawing a high-compression reflowable file. By analyzing the position information and type information of the geometric area of ​​the file, a high-compression format file and the structure description information of the format document are generated; Compression features are divided into different layers, using Mixed Raster Content technology for compression; for format digital books in text format, it can also be compressed using text format book compression technology based on higher compression ratio; for format documents described in markup language The page description information and the logical structure description information are compressed using markup language perception compression technology; the compression efficiency is greatly improved; and a parallel processing method for the page image expansion of the layout document and the expansion of the layout document structure description information is proposed; and according to the page and according to the document logic The structure can be reflowed in two drawing modes to ensure adaptive drawing on output media of different sizes according to the size of the output media.

Description

Technical field [0001] The invention relates to a digital information management technology, in particular to a method for establishing and drawing a highly compressed reflowable file. Background technique [0002] At present, digital books in text format have become the mainstream of mobile reading, such as books in EPUB format and digital books in AZW format from AMAZON, USA. The advantages of using text format digital books are their small capacity, support for retrieval and reflow reading. Many traditional publishing organizations or individuals need to scan paper books into digital books that can be read on mobile terminals so that they can be read on the move. [0003] At present, the bottleneck for reading digital books on mobile terminals is mainly scanned digital books. For example, scanned books in PDF or TIFF format belong to layout documents and do not contain the description of the logical structure and geometric structure of the digital book layout, and cannot be scr...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06K9/20
CPCG06F16/80G06F16/9577G06V10/22
Inventor 龚如宾
Owner 龚如宾
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